Abstract: An intelligent electronic device that can be optionally connected to a DIN rail or a display module without requiring the use of tools. An intelligent electronic device for measuring a characteristic of electricity is provided, which is enclosed in a housing that has a front and a rear. The housing defines an interior volume and includes a sensor configured to sense a characteristic of electricity. The rear of the housing includes a first protuberance structure disposed on a first outer surface. The first protuberance structure contains elongate protrusions and at least one hexagonal protrusion on a second outer surface. The elongate protrusions include upper protrusions and lower protrusions. The lower protrusions include left protrusions and right protrusions, and the at least one hexagonal protrusion is disposed between the left protrusions and right protrusions.

Abstract: The present invention pertains to a device designed for accurate current measurement in a primary conductor. Key components include a current transformer, equipped with a secondary winding and a specified turns ratio, capable of converting the primary current into a proportionally scaled-down secondary current. Integral to the device's operation is a machine-readable code affixed to the current transformer. This code, encoded with calibration data specific to the current transformer's performance characteristics, ensures precise measurements and enhances the device's overall reliability and functionality.

Abstract: The present invention relates to a system for calibrating a current transformer, aimed at enhancing the accuracy of current measurements. The system comprises a current transformer equipped with a non-volatile memory, configured to store a unique identifying serial number. In conjunction with this, a power meter is set up to communicate with the current transformer. The power meter is fitted with a reading module designed to read the unique identifying serial number from the non-volatile memory of the current transformer. The system also includes a server, connected to communicate with the power meter. The server possesses a database that stores calibration data associated with the unique identifying serial numbers. The server is programmed to receive the unique identifying serial number from the power meter and transmit the corresponding calibration data back to the power meter, enabling precise calibration of the current transformer.

Abstract: The invention provides a current measurement device for a primary conductor. The device utilizes a Rogowski coil to generate an output voltage proportional to the rate of change of the primary current flowing through the conductor. The device also includes a calibration unit, operatively connected to the Rogowski coil. The calibration unit is designed to modify the output voltage using a predefined calibration factor, which is determined based on a physical attribute of the Rogowski coil. The device allows for accurate measurement of the current by considering the unique physical characteristics of the coil used in the measurement process.

Abstract: A Rogowski integrator kit, equipped with RJ45 socket, that provides simple installation and protection against Electromagnetic Interference (EMI) and Electrostatic Discharge (ESD). The kit consists of a Rogowski coil that comes with a first RJ45 socket and an electrical integrator that includes a second RJ45 socket. With these features, the Rogowski integrator kit ensures reliable and accurate measurement in a safe and secure manner.

Abstract: A Rogowski integrator kit, equipped with RJ45 socket, that provides simple installation and protection against Electromagnetic Interference (EMI) and Electrostatic Discharge (ESD). The kit consists of a Rogowski coil that comes with a first RJ45 socket and an electrical integrator that includes a second RJ45 socket. With these features, the Rogowski integrator kit ensures reliable and accurate measurement in a safe and secure manner.

Abstract: The present invention relates to an electricity meter with a unique structure to prevent tampering and damage to the nameplate. The meter comprises a drawer-like structure with an opening, a nameplate positioned within the drawer-like structure, and a cover fixed to the drawer-like structure over the opening. The cover is designed to protect the nameplate from any external factors that could potentially damage or tamper with it. This innovative design ensures the accuracy and reliability of the electricity meter, preventing any interference with the nameplate. The design can be adapted to various types of electricity meters, making it an essential feature for maintaining the integrity of the meter.

Abstract: Provided is a DC meter for an electrical vehicle station. Specifically, the DC meter includes a first current input; a second current input; a voltage input; at least one analog-to-digital converter coupled to the first current input, the second current input and the voltage input, and configured for converting analog signal output from the current inputs and voltage input to digital data; at least one processing module coupled the at least one analog-to-digital converter, the at least one processing module is configured to: calculate the first current parameter through the first current input; calculate the second current parameter through the second current input; calculate the voltage parameter from the voltage input; compute a first energy consumption according to the first current parameter and the voltage parameter; compute a second energy consumption according to the second current parameter and the voltage parameter.

Abstract: A system for determining the location of a disturbance event in a power system. The system includes a power feed bus for supplying electrical signal and an Intelligent Electronic Device coupled to the power feed bus. The Intelligent Electronic Device determines the single-phase direction of the disturbance event according to the changes between the average pre-event power, average pre-event current and average pre-event voltage and the average post-event power, average post-event current and average post-event voltage.

Abstract: An Intelligent Electronic Device (IED) for measuring a zero-crossing based electrical parameter when there is power quality disturbance in the power supply network. More specifically, the IED includes at least one sensor configured for sensing at least one electrical parameter of electrical power distributed from an electrical distribution system to a load, at least one analog-to-digital converter coupled to the at least one sensor and configured for converting an analog signal output from the at least one sensor to digital data, at least one processing module coupled to the at least one analog-to-digital converter, the at least one processing module is configured to receive the digital data, determine that the IED enters loss of synchronization according to the received digital data, measure a zero-crossing based electrical parameter of the digital data according to the cycle of the digital signal immediately before loss of synchronization.

Abstract: Provided are a method and apparatus for system self-recovery. Specifically, a power meter employs a method in which a processor monitors the status of threads running in the power meter. The threads include at least one critical thread for measuring electricity usage at a metering point and at least one noncritical thread for other auxiliary functions. The Power meter can reboot if the status received from the threads indicates that a critical thread among the at least one critical thread works abnormally, and can restart the noncritical thread if the status received from the threads indicates that a noncritical thread among the at least one noncritical thread works abnormally.

Abstract: A method and apparatus generate an energy pulse output while improving the accuracy of energy pulse output. Specifically, an Intelligent Electronic Device employs a method in which a processor receives digital electrical parameter data to at least two buffers alternately; compute a power value in a full zero-crossing cycle in accordance with the digital electrical parameter data when one of the at least two buffers gets fully filled and storing the power value; divide a period that each buffer takes from empty to getting fully filled into a series of intervals; calculate energy consumption in each interval based on the power value stored; totalize the energy consumption; generate an energy pulse output according to a pre-determined threshold and the totalized energy consumption.

Abstract: An integrator for monitoring at least one parameter of an electrical signal in an electrical conductor in protective relay application. The integrator includes an integrator circuit having an input for receiving a signal from a current sensor coupled to the electrical conductor. A switch circuit has an input coupled to the output of the integrator circuit, wherein the switch circuit is controlled by the output of a temperature detection circuit. A power stage circuit has an input coupled to the output of the switch circuit, wherein the temperature detection circuit is coupled to a heating element of the power stage circuit through a temperature sensor, and the heating element is attached to a channel-shaped heatsink for heat dissipation.

Abstract: Provided are a method and apparatus for generating an electrical parameter identifier in an Intelligent Electronic Device (IED). Specifically, the method includes obtaining attributes of the electrical parameter and generating an identifier for the electrical parameter according to the attributes.